<template>

  <Swiper :options="Swiperoptions">
    <SwiperSlide v-for="(item,index) in skuImageList" :key="item.id">
      <img :src="item.imgUrl" 
      alt="图片正在加载中---" 
      :class="{active:index == activeIndex}"
      @click="changeActive(index)">
    </SwiperSlide>
    <!-- 插槽提供左右按钮 -->
    <div class="swiper-button-prev" slot="button-prev"></div>
    <div class="swiper-button-next" slot="button-next"></div>

  </Swiper>
</template>

<script>
import { mapGetters } from 'vuex';
export default {
  name: 'ImageList',
  data() {
    return {
      Swiperoptions: {
        slidesPerView: 3, //可以控制显示图片的数量
        navigation: {
          // 左右导航按钮
          nextEl: '.swiper-button-next',
          prevEl: '.swiper-button-prev',
        },
      },
      activeIndex:0 //默认第一章图片显示高亮
    };
  },
  computed: {
    ...mapGetters(['skuImageList']),
  },
  methods: {
    changeActive(index){
      this.activeIndex = index  //默认第一张图片显示高亮,让图片的index等于0
      //把高亮的索引值传递给zoom组件,兄弟组件通信,实现联动效果
      this.$bus.$emit('changeIndex',index)
    }
  },
};
</script>

<style lang="less" scoped>
.swiper-container {
  height: 56px;
  width: 412px;
  box-sizing: border-box;
  padding: 0 12px;

  .swiper-slide {
    width: 56px;
    height: 56px;

    img {
      width: 100%;
      height: 100%;
      border: 1px solid #ccc;
      padding: 2px;
      width: 50px;
      height: 50px;
      display: block;

      &.active {
        border: 2px solid #f60;
        padding: 1px;
      }

      &:hover {
        border: 2px solid #f60;
        padding: 1px;
      }
    }
  }

  .swiper-button-next {
    left: auto;
    right: 0;
  }

  .swiper-button-prev {
    left: 0;
    right: auto;
  }

  .swiper-button-next,
  .swiper-button-prev {
    box-sizing: border-box;
    width: 12px;
    height: 56px;
    background: rgb(235, 235, 235);
    border: 1px solid rgb(204, 204, 204);
    top: 0;
    margin-top: 0;
    &::after {
      font-size: 12px;
    }
  }
}
</style>